url rewrite and routing

 
 when HTTP_REQUEST { 
  
     Make sure to add a OneConnect profile with this iRule 
     http://devcentral.f5.com/wiki/default.aspx/AdvDesignConfig/oneconnect 
  
     If language already exists from prior HTTP request 
      on same TCP connection, unset it 
    if {[info exists language]}{ 
       unset language 
    } 
  
     Check requested path 
    switch -glob [HTTP::path] { 
       "/en/* { 
          set language "en" 
          pool pool_en 
       } 
       "/fr/*" { 
          set language "fr" 
          pool pool_fr 
       } 
       default { 
  
           No language prefix in the path,  
     so check if pool selector cookie has a value 
  if {[HTTP::cookie value "lang"] ne ""}{ 
  
      Select pool based on cookie value 
     switch [HTTP::cookie value "lang"] { 
        "en" { 
           pool pool_en 
        } 
        "fr" { 
           pool pool_fr 
        } 
     } 
          } 
       } 
    } 
  
     If there was a language prefix in the URI, remove it 
    if {[info exists language]}{ 
  
        Remove /en/ or /fr/ from the requested path 
       HTTP::path [string range [HTTP::path] 0 3] 
    } 
 } 
 when HTTP_RESPONSE { 
  
     Set a pool selector cookie in response 
    if {[info exists language]}{ 
  
       HTTP::cookie insert name "lang" value $language path / 
    } 
 }